Toyota Tacoma (2015-2018) Service Manual: Steering Angle Sensor Zero Point Malfunction (C1290)
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor zero point every time the ignition switch is turned ON and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the previous zero point.
If front wheel alignment or steering wheel position is adjusted without disconnecting the negative battery terminal, or if yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU (brake actuator assembly) detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.
The steering angle sensor zero point malfunction warning will be canceled by turning the ignition switch off.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1290 |
Steering Angle Sensor Zero Point Malfunction |
The steering angle sensor zero point calibration position vastly differs from the recorded value. |
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point
calibration and store system information (See page
.gif)
).
PROCEDURE
|
1. |
PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor (See
page ).
HINT:
- When the stored zero point of the yaw rate and acceleration sensor is cleared, the steering angle sensor zero point will also be cleared.
- If the zero point and output value of the yaw rate and acceleration sensor and the output value of the speed sensors are not normal, steering angle sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.
|
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|
2. |
PERFORM STEERING ANGLE SENSOR ZERO POINT CALIBRATION |
(a) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.
(b) Check that the centered position of the steering wheel is correctly set while driving straight ahead.
HINT:
If front wheel alignment and steering position are adjusted as a result of abnormal centered position of the steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.
OK:
The centered position of the steering wheel is correctly set.
| OK | .gif) |
END |
| NG | |
ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION |
Transfer L4 Position Switch Circuit (C1268)
DESCRIPTION
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1268
Transfer L4 Position Switch Circuit
Ei ...
Diameter of the Tire is not Uniform (C1337)
DESCRIPTION
The skid control ECU (brake actuator assembly) measures the speed of each wheel
by receiving signals from the speed sensors. These signals are used for recognizing
whether all 4 wheel ...
Other materials:
Registered Device cannot be Deleted
PROCEDURE
1.
DELETE OPERATION
(a) Check if a registered portable player can be deleted normally.
OK:
Registered portable player can be deleted normally.
OK
END
NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYM ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
When removing the name plates or stripe tapes, heat the vehicle body or tail
gate and name plates or stripe tapes using a heat light.
Heating Temperature
Item
Temperature
Vehicle Body or Tail Gate
40 to 60 ...
All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions
Operate
DESCRIPTION
When the wireless operation can be used to lock and unlock the doors, communication
between the electrical key and TPMS receiver assembly and certification ECU (smart
key ECU assembly) is normal. If the entry lock and unlock functions do not operate,
the entry cancel function may ...
